Guglielmo Lanzani, Center for Nano Science and Technology of IIT & Politecnico di Milano, Italy
This talk introduces the use of organic semiconductors as artificial photoreceptors in bio-mimetic devices. This research started some years ago by demonstrating that organic semiconductors can be used to reproduce the natural retina photoreceptor spectral response in standard photo-diodes [1]. The second step was the development of hybrid solid liquid photodiodes that can naturally interface with a biological environment through the electronic/ionic interface [2]. Subsequently we were able to demonstratethat primary neurons rom rat brains grown on top of a photovoltaic semiconducting polymer acquire light sensitivity [3]. This occurs through a specific mechanism of cell stimulation by polymer photoexcitation (CSP) that will be discussed in the presentation. We then studied explanted retinas put in contact with our organic device. We will show that blind retinas, i.e. retinas with severe damage of the photoreceptors, do regain light sensitivity, as demonstrated by ganglion cell electrical activity upon illumination [4]. The process, its relation to CSP, perspective and future developments will be discussed.
- M. Antognazza et al., Appl. Phys. Lett. 90, 163509 (2007)
- M. Antognazza et al., Appl. Phys. Lett. 94, 243501 (2009)
- Diego Ghezzi et al., Nat. Commun. 2, 166 (2011)
- Diego Ghezzi et al., Nat. Photonics 7, 400 (2013)
Site web du groupe de Prof. Lanzani's
Cette conférence s'adresse à tous, y compris les professeurs, les chercheurs et les étudiants des trois cycles.
Le café est servi à partir de 11h20.
Cette conférence est présentée par le RQMP Versant Nord du Département de physique de l'Université de Montréal et le Département de génie physique de Polytechnique Montréal.
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